What To Do This Week, June 23-26

New York’s on-going battle with filth is always won by a narrow margin, but it’s still sometimes difficult to tell whether it was the rats or the humans who came out on top. The Brooklyn Brainery takes on our sordid relationship with waste with a class covering its history from the 19th century through the present. They’ll dive into topics ranging between public health, the Department of Sanitation, the Fresh Kills Landfill, environmental justice and recycling. Admission is $10 per person.

During one of the most sunlit times of year, we’re also thinkin’ about how to get those shiny rays underground, too. Hop over to the Bowery Hotel to support the folks looking to build the Lowline and you’ll be rewarded with jams from Nancy Whang (of LCD Soundsystem and The Juan Maclean) and Chances with Wolves. General admission tickets are a $30 suggested donation, with additional ticket packages available that include cocktails, limited edition glow-in-the-dark Lowline tote bags and terrariums.

Even for the hardest of hearts, “When Harry Met Sally” remains one of those classic romantic comedies that feels more sincere than saccharine. A cross-country drive between strangers paves the way for real discussions on male-female friendships. It’s also just plain fun to watch, and to laugh at all the poor souls who’ve tried to reenact the movie’s scene at Katz’s Deli. This Tuesday, everyone will have a chance to catch the flick across the city, with simultaneous screenings starting at 8:30 p.m. at outdoor locations in every single borough. Plus admission is free, so we’ll have what New York is having.

Sure, the name says “film fest,” but the first word is king here. While there are some amazing visuals to peep, the Bicycle Film Festival is about much more than watching movies. This year’s lineup includes after parties to follow each night of screenings, along with a goldsprints competition (an intense high-speed stationary bike race) and even a bike ride around the city with one of the filmmakers. Festival passes are $40 per person for the four-day fest, or individual tickets are available for each screening.